/*-
 * #%L
 * HAPI FHIR - Docs
 * %%
 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package ca.uhn.hapi.fhir.docs;

// START SNIPPET: client

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.rest.annotation.RequiredParam;
import ca.uhn.fhir.rest.annotation.Search;
import org.hl7.fhir.r4.model.Identifier;
import org.hl7.fhir.r4.model.Organization;
import org.hl7.fhir.r4.model.Patient;
import org.hl7.fhir.r4.model.Reference;

import java.io.IOException;
import java.util.List;

public class CompleteExampleClient {

	/**
	 * This is a simple client interface. It can have many methods for various
	 * searches but in this case it has only 1.
	 */
	public interface ClientInterface extends IRestfulClient {

		/**
		 * This is translated into a URL similar to the following:
		 * http://fhir.healthintersections.com.au/open/Patient?identifier=urn:oid:1.2.36.146.595.217.0.1%7C12345
		 */
		@Search
		List<Patient> findPatientsForMrn(@RequiredParam(name = Patient.SP_IDENTIFIER) Identifier theIdentifier);
	}

	/**
	 * The main method here will directly call an open FHIR server and retrieve a
	 * list of resources matching a given criteria, then load a linked resource.
	 */
	public static void main(String[] args) throws IOException {

		// Create a client factory
		FhirContext ctx = FhirContext.forDstu2();

		// Create the client
		String serverBase = "http://fhir.healthintersections.com.au/open";
		ClientInterface client = ctx.newRestfulClient(ClientInterface.class, serverBase);

		// Invoke the client to search for patient
		Identifier identifier =
				new Identifier().setSystem("urn:oid:1.2.36.146.595.217.0.1").setValue("12345");
		List<Patient> patients = client.findPatientsForMrn(identifier);

		System.out.println("Found " + patients.size() + " patients");

		// Print a value from the loaded resource
		Patient patient = patients.get(0);
		System.out.println("Patient Last Name: " + patient.getName().get(0).getFamily());

		// Load a referenced resource
		Reference managingRef = patient.getManagingOrganization();
		Organization org = client.getOrganizationById(managingRef.getReferenceElement());

		// Print organization name
		System.out.println(org.getName());
	}
}
// END SNIPPET: client
